Rollup merge of rust-lang#5710 - lcnr:patch-1, r=flip1995

typo

changelog: none

Author: flip1995

clippy_lints/src/new_without_default.rs

@@ -33,7 +33,7 @@ declare_clippy_lint! {
     /// }
     /// ```
     ///
-    /// To fix the lint, and a `Default` implementation that delegates to `new`:
+    /// To fix the lint, add a `Default` implementation that delegates to `new`:
     ///
     /// ```ignore
     /// struct Foo(Bar);